six channel pre-amp processor with signal delay, equalization and

Six Channel Pre-amp Processor with Signal Delay, Equalization and Selectable Electronic Crossover

The DQDX is your gateway to amaz-ing sound from any aftermarket audio system. It is a compact, six channel, high-performance signal processor with independent multi-channel equaliza-tion and signal delay to custom tune the system plus a selectable electronic crossover for precise system set-up.

In short; the DQDX can “Make Good Sound Great”!

®Making Good Sound Great®

®

Key Features of The DQDXHere are some of the unique features of the AudioControl DQDX:• User-friendly Signal Delay to control the acoustical alignment between the

left and right channels plus the front and subwoofer channels • Individual equalization controls for the front, rear and subwoofer channels

for simple yet precise system tuning• Fully adjustable 24dB/Octave Linkwitz-Riley electronic crossover• PFM (Program Frequency Match) Subsonic Filter • Six channels of RCA line level inputs • ACR-3 Dash Control Remote allows for control of the subwoofer level

plus processing bypass • Discrete Input and Output level controls with clipping indicators• Remote turn on output provides a 12-volt trigger to turn on

your amplifier• Built in Pink Noise for easy Signal Delay and Equalizer tuning

and system set-up• Bulletproof 5 year warranty

(when installed by an authorized AudioControl dealer)

Quick Install GuideIf you are a seasoned audio enthusiast and are chomping at the bit to begin

your experience with the DQDX, we offer some Quick Install Guidelines be-low to help maximize your experience. Please refer to the system diagrams on page 8 as good guidelines.

1 Physically mount the DQDX in a location that keeps it away from bever-age spills, food crumbs, and curious fingers. You will want to select a location that allows you access to the top panel controls.

2 The DQDX needs to be installed in the signal path between your source unit (or as some may call it, “Your Radio”) and an after-market amplifier(s)..

Note: If your source unit has front, rear, and subwoofer RCA Line Level out-puts, connect them to the corresponding inputs on your DQDX. If your source unit has only front and rear inputs fear not! Just connect these to the front and rear inputs on the DQDX and switch the “Sub to Front” jumper to the ON position. There is a more detailed of the jumpers located under the cover in the section titled “Under The Cover” (Duh!). Changing this jumper to ON will route the low pass signal (as defined by your crossover selection) to the Sub outputs of the DQDX.

3 Use RCA connecting cables to connect the RCA outputs of the DQDX to your after market amplifier(s). If this is not obvious to you, quickly pack up your DQDX and run to your nearest authorized AudioControl dealer to have them perform the installation. You will thank us later.

4 Connect +12 volt power, ground and turn-on wires as needed. Don’t forget the fuse!

5 Connect your amplifier trigger input to the 12-volt trigger output of the DQDX.

6 VERY IMPORTANT! Make sure the input gain control on your after-market amplifier(s) are all the way down (usually counter clockwise).

7 Turn on the system and level match your DQDX to your source unit and amplifiers.

8 Select the correct crossover point on your DQDX to create a Hi-Pass for the front and rear outputs and a Low-Pass for your subwoofer output, if you are not using the crossover on your source unit. We would always recommend turning the crossovers OFF on your source unit and using the sweet crossover in the DQDX.

9 On the chassis of the DQDX, set Signal Delay Mode to Set-Up. 0 Using the Dash Control, adjust the signal delay between the Left and Right

channels for optimum sound. Tap the ACR-3 Dash Control and adjust the signal delay between the front

and subwoofer outputs.

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On the chassis, change Signal Delay Mode back to Normal.Set the equalization controls for the front, rear, and subwoofer channels.

While your ears are a good reference point, we recommend using an audio analyzer whenever possible. To engage the pink noise output of the DQDX for help setting up the equalizer, press and hold the ACR-3 remote knob down for about four seconds. This will switch the outputs of the DQDX from music to Pink Noise. When you are done setting up the Equalizer you can just press and hold the remote again for 4 seconds and it will turn the Pink Noise output off.

Sit back and enjoy the soundIf you have made it to this point and you don’t have any questions, then

“Congratulations”! With that said we certainly encourage you to set aside some time to grab a beverage or two and read through this entire manual, since there is a tremendous amount of useful information. Plus we took the time to write it so it would make us feel a whole lot better.

We now interrupt your reading of this manual to highlight a very important feature of all AudioControl Autosound products…

Our Bulletproof WarrantyAudioControl Autosound products are designed and assembled at our factory

in the Pacific Northwest, just outside of a little town called Seattle, Washing-ton. By nature, our products are rather sophisticated so we spend a good deal of time training our dealers and their installation team. We do this so you will get the best possible results from your AudioControl components.

To reinforce this point, if you have an Authorized AudioControl dealer install your DQDX, we will extend the normal one-year warranty to a full FIVE years parts and labor. Complete details of this warranty are listed at the end of this manual and on our website at www.audiocontrol.com.

We now return you to your regularly scheduled reading.

A Guided Tour of DQDX1 RCA Line-Level Inputs - The DQDX has six RCA line level inputs.

These inputs get their signals from the RCA outputs of your source unit. If your source unit has front, rear, and subwoofer RCA Line Level outputs, connect them to the three sets of corresponding inputs on your DQDX. If the source unit only has one output, the Front to Sub circuitry in your DQDX selectively routes the Front input channels to the subwoofer channels when you have the jumper in the appropriate position (see the next section on “Under The Cover” on internal jumper positions).

2 Input and Output Level Controls - These will allow you to adjust the signal level from your stereo or source unit to match the input of your after-market amplifiers. Please refer to the section on Level Matching page 13 for a more detailed description on how to set these correctly.

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3 Equalization Controls - To custom tune your system, the DQDX gives you dedicated equalization controls for the Front, Rear, and Subwoofer outputs. See the section on Equalization Optimization on page 10 for a more detailed description on how to set these adjustments for optimum performance.

4 24dB/Octave Linkwitz Riley Crossover - What is the benefit of fine tuning your system if you cannot accurately route the proper frequencies to the proper amplifier channels? The programmable audiophile crossover in the DQDX is the same crossover as in many other award winning AudioControl components. Know who else gives you a 24dB Linkwitz-Riley in their EQ? Nobody! This is also a far cry from the wimpy crossovers that find their way into some amplifiers these days.

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5 Signal Delay Mode - This allows the user to put the DQDX into Set-Up mode and adjust the signal delay settings using the dash control. See page 9 for details on setting this up.

6 Ground - Connect to a good, verified chassis ground (the battery is the best possible location.) Since factory ground wires typically have multiple devices connected to them and could cause ‘Noise’ in the audio system, we would rec-ommend to NOT use factory ground wires or locations.

7 +12V Power - Connect to a good source of 12-Volt power. Be sure to use a fused connection that does not exceed 2 Amp. Doing so may damage your DQDX.

8 Remote In - This is the ‘on’ and ‘off’ selector for your DQDX. Connect this wire directly to your source unit 12Volt trigger wire. If your source unit is not equipped with a 12 Volt trigger wire then find a reliable source in the vehicle that comes on when the key is in the ‘On’ position and turns off when the key is in the ‘Off’ position.

9 Remote Out - Connect the 12 Volt turn on lead for your aftermarket ampli-fiers directly to this connection and not to any other. This is critical to eliminate any ‘clicks’ or ‘pops’ during power up and power down cycles.

0 Maximized Indicators - These brightly colored LED’s indicate when the signal level coming into and going out of your new DQDX is just below clip-ping. When properly level matched with your source unit these LED’s should just barely ‘flicker’ occasionally when your system is playing at its maximum volume level. Please refer to the section on Level Matching, page 13 for a more detailed step by step process (trust us…. This one is important!)

Power - If you have connected all of your power wires correctly, this light should be bright red when your system is on and ready to go!

Remote Level Control (ACR-3 Included) - In the Set-Up mode, this con-trol is used for setting up the signal delays. In Normal mode, it will give the user Subwoofer level control. Additionally, if you press and hold the remote down for 4 seconds, the outputs of the DQDX will turn from music to Pink Noise. This will assist in the proper setting of the EQ and Delay. When the DQDX is in Normal mode, pressing the remote momentarily will defeat all processing on the DQDX (Equalizer and Signal Delay). This is very helpful during set-up to make sure the changes you make to the EQ and Delay made the difference you were looking for.

Pre-Amp Outputs - These RCA plugs should be connected directly to your amplifier inputs. Do not connect any speakers directly to your DQDX and defi-nitely do not connect to any home appliances like your coffee maker or toaster!

Parallel Outputs - The DQDX is equipped with a unique circuit that al-lows for the Front input signal to feed the Subwoofer outputs. See page 12.

Under the Covers - Internal JumpersYou can optimize your DQDX using most of the controls mounted on

the top of the chassis. However, we recognize there are situations where advanced users may have the need to configure the DQDX for specific applications. Therefore we have provided a few setting that are located under the chassis top for limited access.

1 Input Balancing Jumper: For many systems you can leave this jumper in the UNBALANCED position. In other systems, the source unit may look for a ground through the RCA connection to the amplifier and create a ground loop, which in turn can cause a whine (not the type that comes in a bottle) in your system. In that event, you should set this jumper to BALANCED.

2 PFM Jumper: The PFM (Programmable Frequency Match) Filter controls the cutoff frequency of the subwoofer output. The PFM is the bottom limit for the low pass output and will help protect your speakers from a symptom commonly known as “Speaker Explodus”.

3 Ground Isolation Selector: Alternator noise may appear in a sys-tem because the source unit and amplifier(s) are using different ground-ing schemes. To help in this situation, we have provided alternative grounding connections. Make sure your system is turned OFF before you move these jumpers. We ship them in the isolated position, which usually gives the best results.

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Basic DQDX installation using 4 channel input and 6 channel output

Typical DQDX installation

Using a DQDX and The Epicenter from AudioControl to achieve maximum sound quality and bass

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Great Features of the DQDXSignal Delay Operation

Because of speaker placement limitations and seating positions in a car, the driver of the vehicle is in an incorrect acoustic alignment with the speakers. The following steps will guide you in delaying the appropriate speakers for just a few milliseconds, so the DQDX is able to allow the different signals to arrive at the same time putting the driver in perfect acoustical alignment.

1 For best performance and ease of set-up, go to our website at www.audiocontrol.com and download the Signal Delay Set-Up App for your Apple iPhone or iPad. It’s FREE and will help take all the guess-work out of setting up the delay. However, if you do not have access to an iPhone or iPad, don’t worry, you can easily set up the delay just by using your own two ears.

2 After you have made all your power and ground connections, select your crossover point on the DQDX and set your input and output levels correctly. Turn the Signal Delay knob on the chassis all the way to the right to go into Set-Up Mode. You will notice that when you are in Set-Up mode the Orange light on the chassis turns on and the blue light will blink on the ACR-3 dash remote.

3 You will need to make sure that all your delay settings are at zero. Start with the Left to Right setting (the Red light on the remote will be solid) and turn the knob completely CLOCKWISE until you no longer hear any Mute Clicks. Once you have verified your Left to Right is set to zero you want to now set your Sub to Front delay at zero. Simply push the dash remote to switch from Left to Right to Sub to Front. At this time the blue light will continue to blink and the red light will turn off. Again, turn the knob CLOCKWISE until you no longer hear any Mute Clicks. You have now set all of the delay in the DQDX to zero.

4 Now you are going to want to choose your source material to listen to while setting the delay. Choose a song that has very strong vocals and limited instruments (we are thinking more Adele than 9 Inch Nails on this one). This will make it much easier to “move” the image from down at your left knee where it currently exists, up to the center of the dash where it needs to be. Don’t laugh here but talk radio is also a great source to set the delay because you really are able to ‘visualize’ the per-son’s voice moving as you adjust the delay.

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5 Left / Right Delay Push on the dash remote until the blue LED is blinking and the red LED is solid. With the source material playing, slowly turn the dash control knob COUNTER CLOCKWISE. Each de-tent in the remote represents an amount of time (in milliseconds) that you are delaying the Left Front Speaker. We have added a small Mute Click along with the detent on the remote to help you determine your amount of delay. Keep in mind that if you think you have gone too far you can always start over. Just turn the knob all the way clockwise to start back at zero and slowly turn counter clockwise until you reach your desired re-sult. For reference in most vehicles out there today this will be between three to five clicks.

6 Front/Subwoofer Delay Once you have dialed in your Left / Right delay, it’s time to set up the sub. Push on the dash remote to switch delay modes and verify that the blue light continues to blink but the red light is off. Exactly like you did setting up the front left speaker, start by slowly turning the knob counter clockwise to add delay to both of the front speakers. You will notice with each Mute Click of the remote the sub will move forward toward the driver. Again, if you think you have gone too far or missed that ‘sweet spot’ you can always start over by just turning the knob back all the way clockwise and repeat the process again. Depending on the size of the vehicle this will usually be around 5 clicks of the remote.

Once you have everything where you want it you are done! Easy right? Now just go back to the Signal Delay knob on the cover of the DQDX and turn it counter clockwise back to Normal mode (the blue light will come on) and you are ready to move to the next step of set-up.

Equalization OptimizationWhen it comes to music, everyone has his or her own particular taste.

Some people want pounding bass and crisp, blood curdling highs. Others may prefer a “flat” response (whatever the heck that is). At the end of the day, most people just want their system to sound balanced and “just like it did in the store” or similar to their buddy’s car. The following equaliza-tion guidelines should help you achieve your own personal audio nirvana and if you are looking for more detailed information on setting equalizers and small space acoustics please visit the support section of our website at www.audiocontrol.com.

1 For optimum performance, get your hands on a good quality RTA (real time analyzer); we happen to know someone who makes a really

good one. If you cannot locate an RTA, you probably want to have your authorized AudioControl dealer perform the equalization adjustments since they will have one. You can certainly adjust your DQDX using your ears, however, using an RTA will give you the best results.

2 Begin playing pink noise through your system by pressing and hold-ing the ACR-3 remote button down for 4 seconds. Place the microphone for your analyzer on a microphone stand in the drivers seat and adjust the height so it is where the drivers head would be while sitting. Take a care-ful look at the “curve” on your analyzer and how one frequency combines with the next. There is no one curve that will satisfy every person, as we all have dif-ferent tastes. How else can you explain Liberace or rice cakes? The key is to use your DQDX to help balance your system from one frequency to the next and give your speakers the sparkle, sizzle, detail or punch that the acoustics of the car have compromised.

3 You will want to start equalizing by removing or cutting any large bumps, peaks, or areas with too much energy at a particular frequency. Next, boost the ranges that do not have enough energy. We strongly rec-ommend that you cut or decrease energy before you boost.

4 Although the plethora of knobs on your DQDX can be intimidating, fear not as they were designed to give enough control to maximize your systems performance but not enough to get you in trouble. Here is an explanation of the key areas you should focus on:

Sub-bass: 100 Hz and below – A car without bass is like a day with-out sunshine... unless you live where we do because most of the days in the Pacific Northwest do not have sunshine. This area is one of the more critical although it is also one of the most difficult to properly reproduce. Most people prefer their bass frequencies to be 6 to 9 dB louder than the rest of their system, although there are some crazy folks that prefer their bass substantially louder. The key in this area is to have enough speak-ers and power to produce the amount of bass you desire but don’t use the controls on the DQDX to try and force your speakers to produce sounds they can’t. Too much bass boost creates a condition called “speakerus explodus”, which is not pretty to hear or watch.

Midbass: 100 Hz to 300Hz – The phrase, “too much of a good thing” can certainly apply to the midbass frequencies. This is the transition area

AudioControl Real Time Analyzer

of the audio spectrum that is an octave above your sub-bass frequencies and several octaves below your midrange. Most autosound systems have too much midbass due to the fact that speakers mounted in the doors or kick panels cause resonance’s or peaks in the response curve. These peaks in the midbass can actually mask or block sounds in the all-impor-tant midrange area causing your system to sound dull or lifeless.

Midrange: 300Hz to 3Khz – Musical instruments, vocals, mid-range percussion and many things we associate with imaging and staging hap-pen in this area of the bandwidth. For that reason you will want to keep this area as smooth and balanced as possible. Too much boosting can make you feel like your listening to your system in a tile bathroom. Not enough energy the midrange sounds empty and dry.

Treble: 3KHz and Up – If midrange is the cake, then these high or upper frequencies are considered the frosting. Many autosound systems start a gradual decline in this area which is why speaker placement is very important. The DQDX only gives you a few controls in this area because too much boosting can really make a speaker sound un-natural.

Digitally Selectable Electronic Crossover Since component speakers (like woofers,

midrange and tweeters) are designed to repro-duce certain frequencies, a crossover allows you to match the speaker needs to the appro-priate frequency range. The correct crossover frequency greatly depends on your choice of speakers. This section presents techniques for improving your overall installation if you are installing a bi-amplified system. We recom-

mend choosing a crossover frequency based on your speaker manufac-ture’s specifications. Most manufactures list a recommended crossover frequency as part of the speaker specifications. Choosing the correct crossover point will provide increased speaker reliability and optimum sound quality.

The DQDX comes with a 24/dB Octatve Linkwitz Riley alignment crossover that lets you select the exact crossover point you need for your system. The crossover frequency markings on your DQDX are for refer-ence purposes only. The exact crossover frequency can be found on the chart below. To get to the exact desired frequency simply start out with the crossover selector turned all the way to the left (or counter clock-wise) and count the position clicks until you get to the frequency you want to use.

Level MatchingIf you have ever listened to a friend’s “killer” car audio system and

heard lots of hiss, clicks or pops, then you have experienced an improp-erly level-matched system. When a performance Autosound system is properly level matched, you should get the maximum output from your source unit and amplifiers without any clipping or annoying hiss. The following steps will help guide you through the process!

1 Set your source unit’s fader and balance controls to their center posi-tion and your amplifier(s) gain control to a minimum (usually counter clockwise).

2 Disconnect the output RCA connections between your DQDX and your amplifier(s)… otherwise get some earplugs.

3 Start playing some relatively dynamic music and set the volume on your source unit to about ¾ max volume. You should not hear anything at this point. If you are hearing music, go back to step #2… If you are hearing voices, please go see a doctor!

4 Starting with the DQDX input level controls, adjust the control knob clockwise until the Input Maximized LED just begins to flicker. Do not continue to turn past this point.

5 Now adjust the output level control until the output maximized light starts to flicker.

6 Decrease the volume control on your source unit and turn off the power to the system. Now re-connect the RCA’s between the DQDX and your amplifier(s).

Pos Freq Pos Freq

1 50 7:00 pos, full left rota-tion 12 125

2 50 13 150 1:00 pos3 60 14 1754 65 15 2005 70 8:30 pos 16 2506 75 17 300 3:30 pos7 80 18 4008 85 19 5009 90 20 defeat

10 95 21 defeat 5:30 pos, full right rotation

11 100

7 At his point you can adjust your amplifier gain control according to the specifications of your amplifier manufacturer.

Parallel OutputsThe DQDX is equipped with AudioControl’s unique Front to Sub

circuit input that allows for the Front input signal to feed the Subwoofer outputs, when you do not have a Subwoofer input signal available. This allows your DQDX to accept front and rear inputs channels and give you Front, Rear, and Subwoofer output channels. Refer to the Under The Cover section to learn more on jumper selection.

Remote Level Control - ACR-3The ACR-3 is a multi-function remote that used for making the initial

signal delay adjustments in the Set-Up mode and then providing level control over the Subwoofer output in the Normal mode. This allows you to balance the bass level with the rest of the system and then increase or decrease as needed. An additional feature of the ACR-3 dash remote is that it allows the signal processing of the DQDX (equalization and signal delay) to be switched in and out of the audio circuit. That means that you can hear the system with and without the processing to hear the differ-ence that the tuning makes in the sound of your system.

Dash Control Placement And MountingThe ACR-3 dash control may be mounted under the dash using its own

bracket or through a custom hole in the dash. It should be within reach of the driver and in a spot where the LED is plainly visible.

Bracket InstallationThe dash control mounts with two

screws, which attach to the un-derside of the dashboard. Slide under the dash and place the dash control in its mount-ing position, mark the two mounting holes, drill pilot holes, and secure with two screws.

Custom InstallationFor that custom, finished look, the dash control can be flush mounted

directly on the dash-board (or anywhere else). Referencing the figure above, disassemble the dash control from the mounting bracket. Start by pushing the LED from its holder followed by removing the circuit board

Dash Control Assembly

and rotary control from the bracket. Drill a 9/32 hole in the dashboard for the control along with a 1/8 hole for the lock tab and a 13/64 hole for the LED holder. Reassemble the dash control components on the dashboard.

Block Diagram of the DQDXFeeling lost? Here’s an internal “roadmap” to help you out. This sim-

plified block diagram is a map of the paths your signals take inside the DQDX. With this diagram you can follow each input through the proces-sor. If you do have an issue with the hook-up of your DQDX and need to call for technical assistance, please have this diagram available so we can help you trace the problem and get your system up and running and sounding as awesome as we know it can.

The WARRANTYPeople are scared of warranties. Lots of fine print right? Well, fear

no more, this warranty is designed to make you rave about us to your friends. It’s a warranty that looks out for you and helps you resist the temptation to have your friend, “...who’s good with electronics”, attempt to repair your AudioControl product.

Go ahead and read this warranty, and then take a few days to enjoy your new DQDX before going on line to register your unit at www.audiocontrolregistration.com. We also look forward to your comments while you are registering your DQDX. “Conditional” doesn’t mean anything ominous. The Federal Trade Commission tells all manufacturers to use the term to indicate that certain conditions have to be met before they’ll honor the warranty. If you meet all of these conditions, we will warranty all materials and workmanship on the DQDX for one year from the date you bought it (five years if it is installed by an authorized United States AudioCon-trol dealer). We will fix or replace it, at our option, during that time. Here are the conditional conditions:

1 You have to go to www.audiocontrol.com warranty and register your DQDX within 15 days after purchase.

2 You must keep your sales receipt for proof of purchase showing when and from whom the unit was bought. We’re not the only ones who require this, so it’s a good habit to get into with any major purchase.

3 Your DQDX must have originally been purchased from an autho-rized AudioControl dealer. You do not have to be the original owner, but you do need a copy of the original sales slip.

4 You cannot let anybody who isn’t: (A) the AudioControl factory; (B) somebody authorized in writing by AudioControl to service your DQDX. If anyone other than (A) or (B) messes with your DQDX, that voids your warranty.

5 The warranty is also void if the serial number is altered or removed, or if the DQDX has been used improperly. Now that may sound like a big loophole, but here is all we mean by it. Unwarranted abuse is: (A) physical damage (don’t use the DQDX for a car jack); (B) improper connections (120 volts into the power jack can fry the poor thing); (C) sadistic things. This is the best product we know how to build, but if you mount it to the front bumper of your car, something will go wrong. If an authorized United States AudioControl dealer installs the DQDX, the warranty is five years. Assuming you conform to 1 through 5, and it

really isn’t all that hard to do, we get the option of fixing your old unit or replacing it with a new one.

LEGALESE SECTIONThis is the only warranty given by AudioControl. This warranty gives

you specific legal rights that vary from state to state. Promises of how well the DQDX will perform are not implied by this warranty. Other than what we have covered in this warranty, we have no obligation, express or implied. Also, we will not be obligated for direct or indirect consequen-tial damage to your system caused by hooking up the DQDX. Failure to register warranty information negates any service claims.

™Making Good Sound Great®

®

P/N 913-121-0

22410 70th Avenue WestMountlake Terrace, WA 98043 USA

Phone 425-775-8461 • Fax 425-778-3166www.audiocontrol.com

DQDX SPECIFICATIONSAll specifications are measured at 14.4 VDC (standard automotive volt-

age.) As technology advances, AudioControl reserves the right to continuously change our specifications, like our Pacific Northwest weather although we are working on it.

Maximum output level ............................................................... 7.5VrmsOutput attenuation .................................................................... +/-12 dBFrequency response ............................................................ 10Hz-22kHzTotal harmonic distortion .............................................................. 0.01%Input Impedance ..................................................................... 20 KohmsEqualization Frequencies Front/Rear .. 125Hz, 175Hz, 250Hz, 500Hz, 1kHz, 2kHz, 8kHz Sub Output .. 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100HZ 125HzSignal Delay Left /Right Max Delay ........................................................... 10 ms Front/Sub Max Delay ............................................................ 35 msCrossover Frequency ...................................................... 50Hz to 500HzCrossover Slope ....................................... 24dB /Octave Linkwitz-RileyPFM Frequency ............................................................... 20Hz or 30 Hz Output Impedance .................................................................. 150 OhmsPower supply .......................................High headroom PWM switchingPower draw ..................................................................................350mARecommended fuse rating .......................................................... 2 AmpsRemote trigger max output current ..............................................1 AmpSize .................................................................9.25”W x 5.75”D x 1.25”Weight .............................................................................................. 3 lbs

©2014 AudioControl, Inc. All rights reservedAudioControl, Making Good Sound Great and DQDX are all trademarks of

AudioControl Inc. This manual was conceived, designed, and written on a cold and windy day in the Pacific Northwest which is what the locals from Seattle call “spring.”

six channel pre-amp processor with signal delay, equalization and

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